Guidance and control electronics within the bullet command electromagnetic movements to correct its course and direct the bullet to the target. The moving parts, or actuators, steer tiny fins on the outside of the bullet, much like a rudder on a boat.

Elizabeth Quintana, senior research fellow at the Royal United Services Institute think tank told the BBC: "The public may be uncomfortable with the implications of people being able to use this without needing to have a sight line to the target - you could see this having terrorist uses."

Red Jones said: "It was one of the coolest things I've ever worked on," Red says. "I worked with a great bunch of people who are incredibly bright, incredibly motivated, and who solved a great array of problems. It was awesome."